Can’t eat + pregnant

I’m finding it so hard to eat, not because I feel like it throw it all back up but because I get so full. I’m not exaggerating when I say after two bites of toast this morning I was full, 4 and a half hours later I’m still full. It’s not like me at all usually I eat and eat and eat! Its easier for me to eat at night time and even then it half the portion size I would normally have. I’m worried because obviously it’s not good for me but also I’m pregnant, so if I’m not eating my baby isn’t getting the right nutrients. Help? Any ideas?